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(No Model.) J. J. 85 H. R, ILLIN'GWORTH.

STEAM ENGINE RECORDER.

No. 334,778. Patented Jan. 26, 1886.

l l i l I l l I I i 1- .l. l I 1 ll l I e m E e I WTNESEES: I INV 5. MW W M- fiafi jaw I #MZWVMQE UNITED STATES PATENT OFFICE.

JOSEPH J. ILLINGHVORTH AND HARRY R. ILLINGWORTH, OF UTIOA, N. Y.

STEAM-ENGINE RECORDER.

SPECZFICATION forming part of Letters Patent No. 334,778, dated January 26, 1886.

Application filed February 13, 1885. Serial No. 155,806. (No model.)

To all whom it may concern:

Be it known that we, JosEPH J. ILLING- woRTi-I and HARRY R. ILLINGWOR'IH, of the city of' Utica, in the county of Oneida, and

5 the State of New York, and citizens of the United States, have invented a new and useful Improvementin Steam-Engine Indicators; and we do hereby declare the following to be a full, clear, and exact description of the same,

: reference being bad to the accompanying drawings, and the letters and figures marked thereon.

Our invention relates to an improvement in steam-engine indicators. whereby diagrams may be taken upon a continuous strip of paper taken from a spool on which the same is wrapped, as hereinafter pointed out and claimed.

In the accompanying drawings, Figure 1 mp resents a side view of our improved indicator, the drum being shown in vertical section through line 00 w, Fig. 3, the broken lines indicating a portion of the paper and spool removed. Fig. 2 is a side elevation otthe drum,

showing the paper ribbon wrapped thereon in position for use. Fig. 3 is a crosssection of the indicator on line 3 y, Fig. 1, and a crosssection 01' a spool mounted outside of the drum. Fig. 4. is a side view of the spool. Fig. 5 represents a side view of the spindle. Fig. 6 is a side view of a spindle and clamp for supporting a spool outside of the drum as shown in Fig.

In the accompanying drawings similar let- 3 5 ters of reference refer to corresponding parts throughout the several views.

In constructing our improved indicator we provide cylindrical drum B of the required size, in the wall of which slot 1) is placed, of

0 sufficient width and size to receive the paper ribbon hereinafter mentioned. On the outside of the drum we provide U shaped springs b I), which run parallel with the slot in the drum and are rigidly attached to the external wall of the same. These springs are provided to receive and retain the paper ribbon on the external surface of the drum, as shown in Fig. 2.

\Ve provide spool G, on which is wound or wrapped paper ribbon for use in taking the diagram or diagrams. This spool has a central aperture, and is placed inside of the drum, where it is held by spindle G, which is inserted in the central aperture, the lower end fitting the nut in the bottom of the drum, as indicated in Fig. 1. By this mechanism the spool is mounted 1n the drum, where it is rotated when the paper is unwound and wrapped aroundthe drum for use.

0 represents the nut in the drum, into the upper surface of which the spindle is inserted.

0 represents a recess in the spool, which fits over the nut.

\Ve provide paper ribbon D, which is wrapped or wound on the spool before placing the spool in the drum. The spool is then placed and mounted in the drum to rotate on the spindle. Paper D is drawn through the aperture in the wall of the drum, drawn over or under one of the springs, wrapped around the periphery of the drum, and the end placed under the opposite spring, the end of the paper coming between the springs. This paper can be drawn on the periphery of the drum, whereby a continuous series of diagrams may 5 be taken with the indicator without the necessity of applying and adjusting separate pieces of paper for taking separate diagrams, as heretotore used in steam-indicators.

It is quite obvious that the spool may be mounted on a spindle outside of the drum in such proximity as to allow the paper to be wrapped and held on the drum by means of the springs, whereby the paper ribbon may be moved for taking a successlon of diagrams as before mentioned, and as illustrated in Fig. 3.

E represents a spindle, on which the spool may be mounted, provided with slote for embracing the connecting-bar on the indicator, as shown in Fig. 3, by means of set-screw c, as indicated in Fig. 6.

\Vhat we claim as new, and desire to secure by Letters Patent, is-

The eombination,with the cylinderofasteam- 5 engine indicator and the devices usually employed for producing diagrams of pressure, of a spool adapted to rotate within such cylinder, provided with a slot and holding a continuous strip of paper which is passed through the too slot and over the cylinder and receives a diagram.

Dated Utica, New York, February 11, 1885.

JOSEPH J. ILLINGWVORTH. HARRY R. ILLINGWORTH. Witnesses: 1

CHARLES E. DAVENPORT, PIERREPONT BARTow, 

